diff --git a/setup.py b/setup.py
index 4868dee4..f2a27f37 100755
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@
     ],
     extras_require={
         'test': [
-            'pylint',
+            'pylint==3.0.3',
             'nose2',
             'coverage'
         ],
diff --git a/tests/test_all_fields.py b/tests/test_all_fields.py
index 7451842e..1ec5e065 100644
--- a/tests/test_all_fields.py
+++ b/tests/test_all_fields.py
@@ -289,6 +289,7 @@
         'hosted_invoice_url', # expect https://invoice.stripe.com/i/acct_14zvmQDcBSxinnbL/test...zcy0200wBekbjGw?s=ap
         'invoice_pdf',        # get    https://invoice.stripe.com/i/acct_14zvmQDcBSxinnbL/test...DE102006vZ98t5I?s=ap
         'payment_settings',   # 'default_mandate' subfield unexpectedly present
+        'discount',
         'subscription_details'
     },
     'plans': set(),